How do you enjoy anal sex?

Alecsys
Hi ladies, so I'm kind of embarrassed to ask, but how do you enjoy anal sex?  My husband loves it, but I feel like I'm going to poop myself every time we do it.  We do it every once in a blue moon because I find it sooo uncomfortable lol!  Is it always going to feel like you're going to poop yourself or does it ever get fun?